package com.pkk.components.util.util;

import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;

/**
 * <p>
 * Title:字符编码工具类
 * </p>
 * <p>
 * Description:
 * </p>
 * <p>
 * Copyright: Copyright (c) 2007
 * </p>
 * <p>
 * Company:
 * </p>
 *
 * @version 1.0
 * @author:
 */
public class CharHelper {

  /**
   * 转换编码 ISO-8859-1到GB2312
   *
   * @param text
   * @return
   */
  public static final String ISO2GB(String text) {
    String result = "";
    try {
      result = new String(text.getBytes("ISO-8859-1"), "GB2312");
    } catch (UnsupportedEncodingException ex) {
      result = ex.toString();
    }
    return result;
  }

  /**
   * 转换编码 GB2312到ISO-8859-1
   *
   * @param text
   * @return
   */
  public static final String GB2ISO(String text) {
    String result = "";
    try {
      result = new String(text.getBytes("GB2312"), "ISO-8859-1");
    } catch (UnsupportedEncodingException ex) {
      ex.printStackTrace();
    }
    return result;
  }

  public static String GBK2UTF8(String strVal) {
    try {
      if (strVal == null) {
        return "";
      } else {
        strVal = new String(strVal.getBytes("GBK"), "UTF-8");
        return strVal;
      }
    } catch (Exception exp) {
      return "";
    }
  }

  /**
   * 字符串从GBK编码转换为Unicode编码
   *
   * @param text
   * @return
   */
  public static String GBK2Unicode(String text) {
    String result = "";
    int input;
    StringReader isr;
    try {
      isr = new StringReader(new String(text.getBytes(), "GBK"));
    } catch (UnsupportedEncodingException e) {
      return "-1";
    }
    try {
      while ((input = isr.read()) != -1) {
        result = result + "&#x" + Integer.toHexString(input) + ";";

      }
    } catch (IOException e) {
      return "-2";
    }
    isr.close();
    return result;

  }

  /**
   * Author:Jack Time:2017年9月2日下午5:40:19
   *
   * @param strVal
   * @return Return:String Description:
   */
  public static String ISO2UTF8(String strVal) {
    try {
      if (strVal == null) {
        return "";
      } else {
        strVal = new String(strVal.getBytes("ISO-8859-1"), "UTF-8");
        return strVal;
      }
    } catch (Exception exp) {
      return "";
    }
  }

  /**
   * Author:Jack Time:2017年9月2日下午5:40:25
   *
   * @param strVal
   * @return Return:String Description:
   */
  public static String UTF82ISO(String strVal) {
    try {
      if (strVal == null) {
        return "";
      } else {
        strVal = new String(strVal.getBytes("UTF-8"), "ISO-8859-1");
        return strVal;
      }
    } catch (Exception exp) {
      return "";
    }
  }

  /**
   * 把字符串转换为UTF8859编码
   *
   * @param source 需要进行转换的字符串
   */
  public static final String GBKto8859(String source) {
    String temp = null;
    if (source == null || source.equals("")) {
      return source;
    }
    try {
      temp = new String(source.getBytes("GBK"), "8859_1");
    } catch (Exception e) {
      e.printStackTrace();
      System.err.println("Convert code Error");
    }
    return temp;
  }

  /**
   * 把字符串转换为GBK编码
   *
   * @param source 需要进行转换的字符串
   */
  public static final String toGBK(String source) {
    String temp = null;
    if (source == null || source.equals("")) {
      return source;
    }
    try {
      temp = new String(source.getBytes("8859_1"), "GBK");
    } catch (Exception e) {
      e.printStackTrace();
      System.err.println("Convert code Error");
    }
    return temp;
  }

  /**
   * 把字符串转换为gb2312编码
   *
   * @param source 需要进行转换的字符串
   */
  public static final String toGb2312(String source) {
    String temp = null;
    if (source == null || source.equals("")) {
      return source;
    }
    try {
      temp = new String(source.getBytes("8859_1"), "GB2312");
    } catch (Exception e) {
      e.printStackTrace();
      System.err.println("转换字符串为gb2312编码出错");
    }
    return temp;
  }

  /**
   * 把中文字符串，转换为unicode字符串
   *
   * @param source 需要进行转换的字符串
   * @return 转换后的unicode字符串
   */
  public static String chineseToUnicode(String source) {
    if (source == null || source.trim().length() == 0) {
      return source;
    }
    String unicode = null;
    String temp = null;
    for (int i = 0; i < source.length(); i++) {
      temp = "\\u" + Integer.toHexString((int) source.charAt(i));
      unicode = unicode == null ? temp : unicode + temp;
    }
    return unicode;
  }

  /**
   * 在将数据存入数据库前转换
   *
   * @param strVal 要转换的字符串
   * @return 从“ISO8859_1”到“GBK”得到的字符串
   * @since 1.0
   */
  public static String toChinese(String strVal) {
    try {
      if (strVal == null) {
        return "";
      } else {
        strVal = strVal.trim();
        strVal = new String(strVal.getBytes("ISO8859_1"), "GBK");
        return strVal;
      }
    } catch (Exception exp) {
      return "";
    }
  }

  /**
   * Utf8URL编码
   *
   * @param s
   * @return
   */
  public static final String Utf8URLencode(String text) {
    StringBuffer result = new StringBuffer();

    for (int i = 0; i < text.length(); i++) {

      char c = text.charAt(i);
      if (c >= 0 && c <= 255) {
        result.append(c);
      } else {

        byte[] b = new byte[0];
        try {
          b = Character.toString(c).getBytes("UTF-8");
        } catch (Exception ex) {
        }

        for (int j = 0; j < b.length; j++) {
          int k = b[j];
          if (k < 0) {
            k += 256;
          }
          result.append("%" + Integer.toHexString(k).toUpperCase());
        }

      }
    }

    return result.toString();
  }

  /**
   * Utf8URL解码
   *
   * @param text
   * @return
   */
  public static final String Utf8URLdecode(String text) {
    String result = "";
    int p = 0;

    if (text != null && text.length() > 0) {
      text = text.toLowerCase();
      p = text.indexOf("%e");
      if (p == -1) {
        return text;
      }

      while (p != -1) {
        result += text.substring(0, p);
        text = text.substring(p, text.length());
        if (text == "" || text.length() < 9) {
          return result;
        }

        result += CodeToWord(text.substring(0, 9));
        text = text.substring(9, text.length());
        p = text.indexOf("%e");
      }

    }

    return result + text;
  }

  /**
   * utf8URL编码转字符
   *
   * @param text
   * @return
   */
  private static final String CodeToWord(String text) {
    String result;

    if (Utf8codeCheck(text)) {
      byte[] code = new byte[3];
      code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);
      code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);
      code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);
      try {
        result = new String(code, "UTF-8");
      } catch (UnsupportedEncodingException ex) {
        result = null;
      }
    } else {
      result = text;
    }

    return result;
  }

  /**
   * 编码是否有效
   *
   * @param text
   * @return
   */
  @SuppressWarnings("unused")
  private static final boolean Utf8codeCheck(String text) {
    String sign = "";
    String str = "%e";
    if (text.startsWith(str)) {
      for (int i = 0, p = 0; p != -1; i++) {
        p = text.indexOf("%", p);
        if (p != -1) {
          p++;
        }
        sign += p;
      }
    }
    return sign.equals("147-1");
  }

  /**
   * 判断是否Utf8Url编码
   *
   * @param text
   * @return
   */
  public static final boolean isUtf8Url(String text) {
    text = text.toLowerCase();
    int p = text.indexOf("%");
    Integer num = 9;
    if (p != -1 && text.length() - p > num) {
      text = text.substring(p, p + 9);
    }
    return Utf8codeCheck(text);
  }

  /**
   * 测试
   *
   * @param args
   */
  public static void main(String[] args) {
    // CharTools charTools = new CharTools();
    String url;

    url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";
    if (CharHelper.isUtf8Url(url)) {
      System.out.println(CharHelper.Utf8URLdecode(url));
    } else {
    }

    url = "http://www.baidu.com/baidu?word=%D6%D0%B9%FA%B4%F3%B0%D9%BF%C6%D4%DA%CF%DF%C8%AB%CE%C4%BC%EC%CB%F7&tn=myie2dg";
    if (CharHelper.isUtf8Url(url)) {
      System.out.println(CharHelper.Utf8URLdecode(url));
    } else {
    }

  }

}
